Boiler-furnace



(No Model.)

- G. R. RIGKETTS.

BOILER FURNAGE.

'N0.'256,051. Patented Apr. 4.188

WITNESSES: IN VENTOR:

ATTORNEYS.

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UNITED STATES PATENT OFFICE.

GERARD R. RIGKETTS, OF PROCTORVILLE, OHIO.

BOILER-FURNACE.-

. SPECIFICATION forming part of Letters Patent No. 256,051, dated April4, 1882.

Application filed October-10,1881. N0 model.)

To all whom it may concern:

Be it known that I, GERARD R. RrcKET'rs, of Proctorville, in the countyof Lawrence and State of Ohio, have invented a new and usefulImprovementin Boiler-Furnaces, of which the following is a full, clear,and exact description.

The object of my invention is to obtain perfect combustion of fuel infurnaces, and consequently to insure economy of fuel.

The nature of the improvement consists in heating the air supplied tothe fire-box, utilizing for that purpose the waste heat of the furnace,and also detaining the smoke and gases until they are consumed, forwhich purposes the furnace is constructed as hereinafter described andclaimed.

Reference is to be had to the accompanying drawings, formingpart of thisspecification,

in which similar letters of reference indicate corresponding parts inall the figures.

Figure l is a verticallongitudinal section of a boiler and furnaceembodying my invention, and Fig. 2 is a vertical transverse section ofthe same.

A is the boiler, provided with flue-tubes a, connecting the smoke-box bat the rear with the uptake 0 at the forward end in the usual manner.

B is the fire-box, connected by flue d beneath the boileravith thesmoke-box b, and provided with doors 6, for use when required.

f are the grate-bars, and g the ash-pit, having a door for closing ittightly.

The furnace-shell is surrounded by an outer shell or casing, h, by whicha space or flue, O, is formed at the sides and bottom of the furnace,communicating at the front with the ashpit g, where the inlet isnarrowed by a deflecting plate or bridge, 1 At the rear the shellis openfor the free admission of air.

is k are deflectors, arranged in the flue d, for the purpose ofdirecting and forcing down the heated products of combustion upon theshell of furnace, so as to impart thereto the heat necessary to warm theair coming through the ash-pit are kept closed, except when it isneoessary to supply fuel and remove ashes, and the fire is supplied withair by the flue 0 alone. The air entering theflue 0 becomes heated bycontact with the furnace-shell and by the heat radiated therefrom, sothat it enters the ashpit in a condition for insuring combustion withoutcheck. The deflectors act to detain the smoke and gases until they areconsumed, and the heated products will pass off at an intense anduniform heat.

The shell h being of large capacity, an adequate supply of heated air isinsured at all times. The open end may be curved forward and outward forobtaining stronger draft on steam-\es els when the headway is liable tocieate back-draft.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- The combination, with the boiler A, havingtubes a, opening into the uptake 0, and the dampers k k, of the fire-boxB, connected by a flue, d, controlled by said dam pers,with asmokeflue,b, communicating with tubes a, and the outer shell having a flue, 0,open at the rear and connecting at front \vith'the ash-pit g, wherebythe air enters flue U, is heated from the shell of furnace to thoroughlyignite the fuel in the fire-box, and then passes with the products ofcombustion through flue d, smokeflue b, and tubes a to the uptake 0, asshown and described.

GERARD RQBINSON RICKETTS.

Witnesses:

CORY I. BUsH, A. B. OoLLEY.

